what is a necessary step for constructing perpendicular lines through a point off the line ?(Its not Draw arcs on either side of a given point on the line my assignment says so )

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price